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Unverified Commit abed3d82 authored by Vincenzo Frascino's avatar Vincenzo Frascino Committed by Paul Burton
Browse files

mips: Add clock_getres entry point 



The generic vDSO library provides an implementation of clock_getres()
that can be leveraged by each architecture.

Add clock_getres() entry point on mips.

Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Signed-off-by: default avatarVincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: default avatarPaul Burton <paul.burton@mips.com>
parent 24640f23

arch/mips/include/asm/vdso/gettimeofday.h

+26 −0
Original line number Diff line number Diff line
@@ -22,6 +22,8 @@ 
#include <asm/unistd.h>

#include <asm/vdso.h>



#define VDSO_HAS_CLOCK_GETRES		1



#ifdef CONFIG_MIPS_CLOCK_VSYSCALL



static __always_inline long gettimeofday_fallback(
@@ -79,6 +81,30 @@ static __always_inline long clock_gettime_fallback( 
	return error ? -ret : ret;

}



static __always_inline int clock_getres_fallback(

					clockid_t _clkid,

					struct __kernel_timespec *_ts)

{

	register struct __kernel_timespec *ts asm("a1") = _ts;

	register clockid_t clkid asm("a0") = _clkid;

	register long ret asm("v0");

#if _MIPS_SIM == _MIPS_SIM_ABI64

	register long nr asm("v0") = __NR_clock_getres;

#else

	register long nr asm("v0") = __NR_clock_getres_time64;

#endif

	register long error asm("a3");



	asm volatile(

	"       syscall\n"

	: "=r" (ret), "=r" (error)

	: "r" (clkid), "r" (ts), "r" (nr)

	: "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13",

	  "$14", "$15", "$24", "$25", "hi", "lo", "memory");



	return error ? -ret : ret;

}



#ifdef CONFIG_CSRC_R4K



static __always_inline u64 read_r4k_count(void)

arch/mips/vdso/vdso.lds.S

+1 −0
Original line number Diff line number Diff line
@@ -95,6 +95,7 @@ VERSION 
	global:

		__vdso_clock_gettime;

		__vdso_gettimeofday;

		__vdso_clock_getres;

#endif

	local: *;

	};

arch/mips/vdso/vgettimeofday.c

+12 −0
Original line number Diff line number Diff line
@@ -23,6 +23,12 @@ int __vdso_gettimeofday(struct __kernel_old_timeval *tv, 
	return __cvdso_gettimeofday(tv, tz);

}



int __vdso_clock_getres(clockid_t clock_id,

			struct old_timespec32 *res)

{

	return __cvdso_clock_getres_time32(clock_id, res);

}



#else



int __vdso_clock_gettime(clockid_t clock,
@@ -37,4 +43,10 @@ int __vdso_gettimeofday(struct __kernel_old_timeval *tv, 
	return __cvdso_gettimeofday(tv, tz);

}



int __vdso_clock_getres(clockid_t clock_id,

			struct __kernel_timespec *res)

{

	return __cvdso_clock_getres(clock_id, res);

}



#endif